package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Override
    @Transactional(rollbackFor = Exception.class)
    public void save(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.save(dish);
        dishDTO.setId(dishMapper.getIdByName(dish.getName()));
        List<DishFlavor> flavors = dishDTO.getFlavors();
        Long id = dishDTO.getId();
        if (flavors==null || flavors.size()==0){
            return;
        }
        dishFlavorMapper.save(flavors,id);
    }


    @Transactional(rollbackFor = Exception.class)
    @Override
    public void deleteById(List<Integer> idlist) {
        for (Integer id : idlist){
            DishVO dishVO = dishMapper.getById(id.longValue());
            if (dishVO.getStatus() == 1){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
            if (dishMapper.countBySetmealId(id.longValue()) >0){
                throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
            }
        }
        dishMapper.deleteById(idlist);
        dishFlavorMapper.deleteByDishId(idlist);
    }

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        //启动分页插件
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> list = dishMapper.page(dishPageQueryDTO);
        return new PageResult(list.getTotal(),list.getResult());
    }

    @Override
    public List<Dish> selectByCategoryId(Integer categoryId) {
        return dishMapper.selectByCategoryId(categoryId);
    }

    @Override
    public DishVO getById(Long id) {
        return dishMapper.getById(id);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void update(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);
        List<Integer> ids = new ArrayList<>();
        ids.add(dishDTO.getId().intValue());
        dishFlavorMapper.deleteByDishId(ids);
        if (dishDTO.getFlavors() == null || dishDTO.getFlavors().size()==0){
            return;
        }
        dishFlavorMapper.save(dishDTO.getFlavors(),dishDTO.getId());
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        Dish dish = new Dish();
        dish.setStatus(status);
        dish.setId(id);
        dishMapper.startOrstop(dish);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
